Author Topic: Fluke 199C scopemeter repair (Read 40839 times)

feedback.loop · « **on:** July 28, 2020, 12:22:26 am »

Two 199C units were picked up on eBay for parts. Both are incomplete, but one is more so. The other one was repaired. A keypad board was designed and manufactured. Despite of a silly mistake, this first version turned out to be usable. The second unit also shows some hope, but it needs a memory module and a power connector. It also features a very ugly spot on its LCD. And both units need batteries, so, perhaps, yet another li-ion battery upgrade is coming. Hopefully.

Connector on Mouser: https://www.mouser.com/ProductDetail/649-SLW15S-1C7LF
FFC on Mouser: https://www.mouser.com/ProductDetail/326-42103
Fan on Mouser: https://www.mouser.com/ProductDetail/108-AFB0405LA-A

coromonadalix · « **Reply #1 on:** July 28, 2020, 01:35:26 am »

Incredible work

Shock · « **Reply #2 on:** July 28, 2020, 06:55:49 am »

Congrats on getting them up and running. Hopefully when the battery packs are in the nag goes away, easily tested anyway. Time to binge watch some more of your videos.

avellanet · « **Reply #3 on:** July 28, 2020, 12:43:38 pm »

I am a hobbyist and have learned a lot by watching your videos the last couple of years. I thank you for that. Keep them coming.

Per Hansson · « **Reply #4 on:** July 28, 2020, 03:12:14 pm »

Nice video, I have ordered the power connector directly from Fluke myself, it cost only ca $20 in Sweden excl tax.
This was for a Fluke 225C but the 199C is identical AFAIK only software difference (Bus health test feature)
The part number is provided in this post, it is actually for a 196C but it fit just fine

https://www.eevblog.com/forum/repair/another-fluke-196c-scopemeter-repair/msg985414/#msg985414

feedback.loop · « **Reply #5 on:** July 28, 2020, 07:57:00 pm »

A few hours after publishing my previous video I realized that there is a very easy fix for the problem with the mirrored connector. How come It did not occur to me right away? It is so obvious (once you know the answer)! Just use an FFC with contacts on the opposite sides.

Opposite-side FFC: https://www.mouser.com/ProductDetail/710-686715100001

Simon Spiers · « **Reply #6 on:** July 28, 2020, 08:53:30 pm »

If you have a spare ASIC for the input I would be interested anyone?

EHT · « **Reply #7 on:** July 28, 2020, 09:13:23 pm »

Amazing job making the keypad!

I have a B model and I can hear the fan bearings are going. Pity the same model fan isn't available. I wonder if anyone else has find one that fits the mounting? If you're replacing one, maybe the metal housing can be reused? There is this 'nidec copal' on digikey as well as the Delta brand ones. However, it is 400mW...

coromonadalix · « **Reply #8 on:** July 29, 2020, 02:31:08 pm »

would a reversed flat cable could have worked ?

straight = flat pins on the same side
reversed = flat pins connector on opposed sides

feedback.loop · « **Reply #9 on:** July 29, 2020, 03:50:15 pm »

Here is the response from Fluke technical support regarding the memory module and the power connector with sealing ring:

PN 402224619841/ PN 2042555: Item Desc :FLASH/SRAM MODULE 190BC
This item was discontinued in March 2017

PN 402224492561/ PN 1285578: Item Desc :POWER CONNECTOR SP
MSRP: $33.98
ATP: 6 WEEKS

PN 402224498331/ PN 1286052: Item Desc :SEALING RING FOR POWER CONNECTOR
This item was discontinued in June 2009. Replaced with PN 2413816
PN 2413816: Item Desc :SEALING RING POWERCON.
MSRP: $7.21
ATP: 6 WEEKS

lostking2008 · « **Reply #10 on:** July 31, 2020, 02:15:04 am »

Hi FeedbackLoop,

That's an awesome feast to DIY the kaypad foil for 199C. I need one keypad foil for a 199C. Are you going to put the extra ones up for sale as you mentioned in your video #93?

Thanks,
Ken

feedback.loop · « **Reply #11 on:** July 31, 2020, 05:03:08 pm »

Quote from: lostking2008 on July 31, 2020, 02:15:04 am

Hi FeedbackLoop,

That's an awesome feast to DIY the kaypad foil for 199C. I need one keypad foil for a 199C. Are you going to put the extra ones up for sale as you mentioned in your video #93?

Thanks,
Ken

Perhaps. I still need to order some opposite-side cables, more connectors and give this a try.

Rollin Hand · « **Reply #12 on:** August 01, 2020, 01:18:48 pm »

I need the battery mod.

feedback.loop · « **Reply #13 on:** August 01, 2020, 08:34:08 pm »

Quote from: Rollin Hand on August 01, 2020, 01:18:48 pm

I need the battery mod.

I am working on it.
Teaser photo attached

feedback.loop · « **Reply #14 on:** August 05, 2020, 04:55:32 pm »

DIY Li-ion battery pack for Fluke 19x scopemeters. About twice the capacity of the original Ni-MH pack. Requires a small modification in the scopemeter: adding a 120K 1% resistor across R4113.

Li-ion battery testing using Agilent 661x: https://youtu.be/riB0NASj_KU

Connector housing on Digikey: https://www.digikey.com/product-detail/en/molex/0050375043/WM17405-ND/259392
Crimp contacts on Digikey: https://www.digikey.com/product-detail/en/molex/0008701040/WM17406-ND/259393

feedback.loop · « **Reply #15 on:** August 05, 2020, 06:50:49 pm »

I should have shown a close-up of the BMS in the video.

Vince · « **Reply #16 on:** August 05, 2020, 08:56:36 pm »

Wow, a lot of work/detail indeed, you really do seem to enjoy tinkering with battery replacements !

It was so in depth that I was kinda surprised and " disappointed " that you didn't go to the extent of actually measuring accurately the start-up current of the scope with.. another scope, to see exactly how much current it needs, see the shape of the waveform, how it progressively settles to 900mA etc.. would have been cool

feedback.loop · « **Reply #17 on:** August 05, 2020, 09:01:41 pm »

Many things could have been explored in more detail. Such things take a lot of time. At some point you just have to choose and call something good enough.

Vince · « **Reply #18 on:** August 05, 2020, 09:06:27 pm »

Yes of course !

lostking2008 · « **Reply #19 on:** August 05, 2020, 10:46:51 pm »

Hi FeedbackLoop: This modification is awesome as usual. BTW, I need one keypad foil for a 199C. Just wondering if you'll share the gerber file of the designed keypad foil if possible. Thanks a lot. ---Ken.

Rollin Hand · « **Reply #20 on:** August 06, 2020, 12:16:01 pm »

The BMS is 2S 7.4V 7.2V Li-ion Li-Po Battery Protection BMS PCM Ch/Dis. Current 4A 2S4AW004.

eBay item number:321761796022
I think this is the correct one?
You think is necessary to install the 130k resistor ? it will damage the pack by overvoltage? because my screen is fragile ,for me is to much risk to take it a part.
Thank you.
Rollin

feedback.loop · « **Reply #21 on:** August 06, 2020, 04:43:42 pm »

Quote from: Rollin Hand on August 06, 2020, 12:16:01 pm

The BMS is 2S 7.4V 7.2V Li-ion Li-Po Battery Protection BMS PCM Ch/Dis. Current 4A 2S4AW004.

eBay item number:321761796022
I think this is the correct one?
You think is necessary to install the 130k resistor ? it will damage the pack by overvoltage? because my screen is fragile ,for me is to much risk to take it a part.
Thank you.
Rollin

Looks right. Not the cheapest one though. I believe I have seen under $3 delivered.
I used a 120K resistor. 130K will probably set the voltage too high. I believe it is necessary. As I mentioned in the video, BMS will prevent catastrophic overvoltage, but we should not rely on it for normal charging. It is set to about 8.6V.
On the other hand, removing the main board does not involve removing the LCD. So I don't see a problem.

aqibi2000 · « **Reply #22 on:** August 06, 2020, 09:05:42 pm »

Feedback loop can you share the gerber file so he can fix his 199C?

feedback.loop · « **Reply #23 on:** August 06, 2020, 09:25:25 pm »

I don't mind sharing the gerbers. I am a bit reluctant because I am not proud of the connector placement. I would like to move it a bit down, so that it wouldn't need to be soldered a bit above the board, and it would be a bit easier to install the board. Perhaps I should make the change and run another batch, but I don't need them myself. Is there enough demand, say for 10 boards? Say, we call it $20 plus postage for one kit: board + connector + falt flex (with opposite-side contacts) for the new batch. I still have a couple from the first batch ($30 + postage).

cheeseit · « **Reply #24 on:** August 06, 2020, 10:00:24 pm »

I always thoroughly enjoy your videos!


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Author Topic: Fluke 199C scopemeter repair (Read 40839 times)

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